How can a diet pill make you feel full?

A new tool for fighting the battle of the bulge may soon be available, and it isn't gastric bypass surgery. How can a pea-sized pill shrink your appetite and help you to lose weight?

Led by Professor Luigi Ambrosio, researchers at the National Research Council's Institute for Composite and Biomedical Materials in Naples, Italy, have created a diet pill that expands in the patient's stomach to… » Full Story on HowStuffWorks